greylisting has a small drawback, the delay. After implementation I watched it closely and in my case all legitimate servers sent the message again after 6 minutes or so.
The greylisting for postfix that I use (www.postgrey.org) has a whitelist so if you have 24x7 service contract with company ABC and might need to receive *urgent* mails from them, you can whitelist them.
-Marc
PS (for Jim): my last name is with k instead of c, but most people pronounce it as it is with a c
Chris Santerre wrote:
However there is a chance that legit mail could be delayed 20+ minutes. Even if you set delay to 1 minute. It comes down to how the sender's server is setup. So if you must have email ASAP, be carefull. Otherwise I'm hearing great things.
--Chris
-----Original Message----- From: Marc Kool [mailto:[EMAIL PROTECTED] Sent: Tuesday, August 03, 2004 1:38 PM To: Thomas Kinghorn Cc: [EMAIL PROTECTED] Subject: Re: more are more junk getting through
Tom,
It's a little off topic: I recently implemented greylisting and sender address verification and stopped 80+ % of spam at the MTA (postfix in my case).
I can recommend it to everybody.
-Marc
Thomas Kinghorn wrote:
Hi List
I have had a dramatic increase in junk mail,
I am using SA 2.63 with SURBL. MTA is exim 4.34 using sa-exim-4
I have attached a sample.
Subjects and originating IP's are always different But the formatting of the body is similar.
Any ideas would be appreciated.
<<important increased muscle mass without exercise.msg>>
Regards,
Tom Kinghorn
